204 BRYOLOGY OF NEW ZEALAND. 
groups, always premising that they do not admit of rigid definition, but 
rather consist of a group of characters not all‘of which can be relied on to 
be present in all the species of a group, but on the whole most readily to be 
recognized by the general facies of the plants. 
hat the greater number of Brown’s new species would have to be dropped 
was perhaps to be expected in view of the difficulties of the genus, and the 
fact that he was not. well aequieites with many of the already described 
species. 
Sec. Bryroryrus. 
Subsec. Cladodium. 
1. Cernuiformia. 
Autoicous or synoicous. Nerve ceasing cai or near apex, or shortly excurren 
only. Capsule asymmetric, the spora: m being usually tally ay a 
neck curv od. Outer teeth not anovaceedy striolate ; cilia imperfec 
B. mucronatum. 
Subsec. Hu-bryum. 
Outer teeth often finely pane striolate; inner free; cilia appendiculate 
(except sometimes in B. ¢ um). 
2. Pseudotriquetra. 
Male flower capitulate to subdiscoid. Us sually robust, rather — y tuited 
plants with elongate stems, with the leaves not m ak cts comose. Leaves 
acer —— 8. en and twisted when dry, acu iinet nerve usually 
more or less excurrent. Capsule elongate, symmetric. Seta usually long. 
B. arity ; B. affine; B. austro-pallescens. 
3. Caespitibryum. 
Male flower gemmiform. Plants usually small, in dense tuft poke short stems ; 
_ leaves densely comose, not decurrent, not spirally twisted when n dry, 
te; nerve generally excurrent. Capsule iethce ‘casi pale brown 
Ss reddish- brown 
B. lectus ; B. caespiticium. 
4. Argyrobryum. 
Small dense plants, usually silvery with the long hyaline leaf-points. Capsule 
mall. 
usually short and wide, s: 
B. argenteum. 
lea 
pidate point. Seta mostly short. Pcaake small, short 
thick, ‘anek ak share or quite wanti 
B. dichotomum ; B. cahedaecd: 
Dioicous ; male flower gemmiform. Moderate-sized, rather slender plants, with 
loose, not tomentose s stems ; innovations i Sayely, rather loosely 
foliate ; —— often , Shrunken w erve less stout. - 
usually purple-red when ripe, aaa: with a distinc 
tapering ak 
B. chrysoneuron, subsp. luteo-limbatum. 
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